define turners frontier thesis apush Frederick'jackson'turner's' frontier(thesis'argued'the of'the'frontier'and'1945'marks period 7 flashcardsdocx.
{"Image DocumentName": "Jackson\u2019s Frontier and Turner\u2019s", "Image ImageDescription": "APUSH. Developed from After the Fact: The Art of Historical Detection.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}